Banca de DEFESA: DOMÊNICO WEBER CHAGAS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : DOMÊNICO WEBER CHAGAS
DATE: 29/07/2021
TIME: 14:00
LOCAL: Webconferência via Google Meet - meet.google.com/rub-xynx-aeb
TITLE:

Metabolic profile of sheep in the transition period and its influence on the health of the neonate.

KEY WORDS:

BHBA, calcium, colostrum, brix percentage.

PAGES: 45
BIG AREA: Ciências Agrárias
AREA: Medicina Veterinária
SUMMARY:

The intensification of sheep production, with a focus on increasing prolificity, implies a higher incidence of metabolic disorders, especially in the transition period, which can lead to productive losses with consequences on the health of the animals. The aim of this study was to evaluate the metabolic profile of Lacaune ewes in the transition period and its influence on the quality of colostrum and immunity of lambs. It was carried out on a school farm in the municipality of Bento Gonçalves – RS, from July to August 2019. Nineteen sheep of the Lacaune breed were kept in a semi-extensive system, receiving the same diet. On days -14, -7, -4 of the expected date of delivery and on days 1, 4, 7 and 14 days after delivery, blood samples, body condition score (ECC) and animal weighing were performed. Blood metabolic markers will be evaluated in sheep serum concentrations of total plasma proteins (PPT), albumin, aspartate amino transferase (AST), gamma glutamyl transferase (GGT), betahydroxybutyrate (BHBA), non-esterified fatty acids (NEFA), paraoxonase (PON1), calcium (Ca) and magnesium (Mg). In lambs, the serological parameters evaluated were PPT, albumin and GGT. Colostrum was collected up to 06 hours after delivery, to determine the brix® percentage. Blood samples were taken from the lambs 48 hours after birth. Lamb plasma was used to estimate colostrum efficiency and immunity by % brix and total plasma protein (PPT). The zootechnical data, metabolic variables pre and postpartum of ewes, lambs and those related to colostrum quality were tested for normality of distribution and homogeneity of residues using the Shapiro-Wilk and Levene tests, respectively, using the SAS program . The ECC had a reduction in the postpartum, being evidenced in collections 7 and 14 (2.88 and 2.73, p<0.001), the BHBA presented in the prepartum the highest concentrations detected for ewes that gave birth to triplets, since the day -14 and for twin lambs on day -4 (p=0.0245). NEFA showed the highest value on day 14 in primiparous (1.07; p=0.0042). Ca had the lowest concentrations on day 1 (8.85 mg/dl p<0.01) and Mg on day 3 (1.79 mg/dl, p<0.001) postpartum. The multiparas of two lambs had higher brix percentages (30.5%) and in the primiparae the lowest value was in the ewes that had a single lamb (27.06%; p= 0.0395). Lambs born from triplets had the lowest weight (3.73 kg) and the best % brix were higher in those born from twins (10.29%, p=0.0307). From the data obtained in our study, we concluded that ewes showed lipid metabolism and subclinical ketosis at some periods in the transition period and the colostrum of the lacaune ewes in the study showed good quality. PPT and brix of lambs were better indicators of transfer of passive immunity in ewes that had two lambs.

BANKING MEMBERS:
Externa à Instituição - RAQUEL FRAGA E SILVA RAIMONDO - UFRGS
Externa à Instituição - BEATRIZ RIET CORREA RIVERO - UFRGS
Presidente - 1046884 - ELIZABETH SCHWEGLER